metamorphic

Tumbled yellow-brown stone, likely quartzite or chalcedony

Quartz-rich rock; predominantly microcrystalline quartz (SiO₂), identification uncertain from image alone

AI-generated identification · may be incorrect

Smooth, rounded, opaque to slightly translucent, with yellow-brown coloration likely from iron oxides. Quartz-rich material has Mohs hardness about 6.5–7, vitreous to waxy luster, and no obvious cleavage; specific gravity is typically 2.6–2.7.

Identified September 7, 2026More metamorphic →

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At a glance

Common name: Tumbled yellow-brown stone, likely quartzite or chalcedony
Scientific name: Quartz-rich rock; predominantly microcrystalline quartz (SiO₂), identification uncertain from image alone
Category: metamorphic
Identified: September 7, 2026
Method: Standard

AI Estimated Value

About $1–$10 as a common tumbled stone; potentially $10–$30 if verified as attractive jasper or a quality lapidary specimen.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely a naturally quartz-rich pebble shaped by water and later tumbled or polished; iron staining produced the ochre color. The source rock may range from Precambrian to younger, depending on locality.

Uses & applications

Used as a decorative or worry stone, lapidary material, and inexpensive collectible; similar material may be used for small carvings or cabochons.

Geological facts

The rounded form and uniform surface indicate abrasion or deliberate tumbling rather than a fresh crystal face. It could also be yellow jasper or iron-stained chert, which cannot be reliably separated visually here.

Field identification & locations

Test hardness against glass or a steel file, inspect translucency at the edges, and use a streak test and specific-gravity measurement for confirmation. Comparable pebbles occur widely in river gravels and commercial rock-tumbling mixes.